Give the possibility, as an alternative user interface, to fill a form through a chatbot. all field would correspond to a question, or natural language conversation.
And like for Nintex Mobile, the chatbot would be able to gather multiple form and identify in the conversation which one the user want to fill

For creating ADA compliant forms the Add new row and the x in repeating sections needs to be added to the tab-index so end users with disabilities can easly add rows or delete rows.

The question has been posted on Nintex Community https://community.nintex.com/message/20231. It be nice if we can authenticate against Office365 for forms on Nintex Live.

Able to filter mutliple domains when searching for users in the people picker field or able to restrict the people picker to filter for a single domain

It would be really really great if Nintex Forms multiple lines of text controls (in rich text mode) were compatible with Kwizcom Clipboard Manager (http://www.kwizcom.com/sharepoint-add-ons/SharePoint-clipboard-manager/overview/). This small add-on let the user copy and pasting an image by clicking on a button instead of creating an image file, uploading it in a document Library and then creating a link on the multiple line of text field to the uploaded image. This saves a lot of time!

Right now, Nintex forms do not provide fill-in choices as seen here: http://help.nintex.com/en-US/o365/o365/O365Forms/FormControls/ManagedMetadata.htm

I would like Nintex to support fill-in submissions to MM fields.

An accordion control as an alternative to tabs. A common and familiar interface with many and arguably more elegant than tabs as well.

Once a form has been submitted, and before it goes to the redirect page, can a 'in progress' icon appear so an end user knows it is processing the form (currently it is just a blank webpage and has no feedback for the end user). This is especially evident when there are attachements, as these make the form submission slower.

Speech to text ("Dictation Mode") using a "mic" button in a Nintex form

Provide default themes which can be applied on a form which should change the look and feel of all components placed in a form. for example Themes provided by Telerik for their controls http://docs.telerik.com/kendo-ui/styles-and-layout/appearance-styling

Nintex Live make possible for anonymous to fill a form, but not to come back on this form and edit it.
For exemple, for a customer it would be to be able to edit his personal information that he/she already filled one year before.

The Printing Functionality request which had 490 votes was closed by Nintex after the ability to Print was granted to the Enterprise version of Nintex Forms. Since many of those votes were from Nintex Standard users, I am creating a new item to request for the ability to print forms from Nintex Forms Standard. Please vote here to get your request back on the board.

Allow forms to integrate with language translation services. Currently the only way I can find to support multiple languages (English, Spanish, Cantonese, etc.) is to create multiple forms.

It would be very useful to be able to paste several users in Nintex Forms people picker (if users are copied from Outlook, for example).

https://community.nintex.com/thread/2788

In many cases, users have to reinvent the wheel of connected date pickers, the convenience of filling such data and validation thereof. My suggestion is that Nintex provide a built-in 'date-range-picker' such as those on airline or hotel booking websites where you use the same multi-month calendar for both start and end dates, and the picker also supports max and min dates, the feature requested here: http://nintex.uservoice.com/forums/229406-2-nintex-forms-for-sharepoint/suggestions/5923550-we-have-an-application-form-developed-using-nintex

Current SharePoint spell check capability is clunky and less capable than the spell check built in to modern browsers/OSs.

Would be good to have option to turn off SP spell check and use browser/OS spell check instead.